问题
解答题
下面各题,你认为怎样算简便就怎样算.
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答案
(1)1.25×32×2.5
=1.25×(8×4)×2.5
=(1.25×8)×(4×2.5)
=10×10
=100
(2)
+3 4
×1 4 4 7
=
+3 4 1 7
=25 28
(3)7.38-(1.57+2.38)
=7.38-1.57-2.38
=7.38-2.38-1.57
=5-1.57
=3.43
(4)
+9 10
×999 10
=
×(1+99)9 10
=0.9×100
=90
(5)
÷[1÷(1 6
-3 5
)]3 10
=
÷[1÷1 6
]3 10
=
÷1 6 10 3
=0.05
(6)4.8×96+4.8÷1 4
=4.8×96+4.8×4
=4.8×(96+4)
=4.8×100
=480